Card Retention Mechanism

1. A system comprising: a chassis that comprises front and back portions disposed in respective x,z-planes; a board disposed in a y,z-plane operatively coupled to the chassis wherein the board comprises card slots aligned along respective parallel x,y-planes and circuitry operatively coupled to the slots; a processor operatively coupled to the circuitry of the board; memory accessible by the processor; a retainer that comprises a side member and a cross-member; a handle operatively coupled to the retainer; a biasing mechanism that biases the handle with respect to the retainer; and a bracket operatively coupled to the back portion of the chassis and disposed between the back and front portions of the chassis wherein the retainer is operatively coupled to the bracket and wherein the bracket comprises a side wall disposed in an x,y-plane that comprises a guide that guides rotation of the retainer from an open orientation to an x,z-plane orthogonal to the parallel x,y-planes and that guides the side member of the retainer for translation of the cross-member of the retainer along the x,z-plane toward the y,z-plane of the hoard to a card retention orientation.

2. The system of claim 1 wherein the retainer comprises side members.

3. The system of claim 1 wherein the cross-member comprises a plurality of tongues.

4. The system of claim 3 wherein the tongues comprise spring tongues.

5. The system of claim 3 wherein the tongues comprise cutouts configured to accommodate screws.

6. The system of claim 1 wherein, in the card retention orientation, the retainer is disposed along the plane orthogonal to the parallel planes.

7. The system of claim 1 wherein, in a card positioning orientation, the retainer is disposed along another plane.

8. The system of claim 7 wherein the other plane is orthogonal to the parallel planes.

9. The system of claim 1 wherein the handle comprises a latch and wherein the bracket comprises a keeper.

10. The system of claim 9 wherein the biasing mechanism biases the latch in a latched orientation with respect to the keeper.

11. The system of claim 9 wherein the latch comprises a beveled surface that extends to an edge.

12. The system of claim of claim 1 wherein the handle is pivotally coupled to the retainer and wherein pivoting of the handle releases a latch of the handle from a keeper of the bracket.

13. The system of claim 1 wherein the retainer comprises an axle and a ridge, wherein the bracket comprises an axle guide and a ridge guide and wherein the axle guide guides translation of the axle.

14. The system of claim 13 wherein, in an orientation where the ridge is disposed in the ridge guide, the ridge and the ridge guide limit pivoting of the retainer with respect to the bracket.

15. The system of claim 1 wherein the board comprises a motherboard wherein the processor is mounted to the board via a processor socket.

16. The system of claim 1 comprising a card disposed in one of the card slots.

17. The system of claim 1 wherein the card slots comprise PCI card slots.

18. The system of claim 17 comprising PCI cards disposed in the PCI card slots.